CS8190EDWFR20 View Datasheet(PDF) - Cherry semiconductor
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Description
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CS8190EDWFR20 Datasheet PDF : 8 Pages
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Speedometer/Odometer or Tachometer Application
Speedo
Input
R2
R3
R4
CT
C3
Battery
D1 R1
D2 C1 C2
1 CP+
2 SQOUT
3 FREQIN
4 Gnd
5 Gnd
6 COS+
7 COS-
8 VCC
CP- 16
F/VOUT 15
VREG 14
Gnd 13
Gnd 12
SINE+ 11
SINE- 10
BIAS 9
C4+
RT
COSINE
SINE
Gnd
Air Core
Speedometer
Gauge
200W
Figure 6
R1 - 3.9, 500mW
R2 - 10k½
R3 - 3k½
R4 - 1k½
RT - Trim Resistor ±20 PPM/DEG. C
C1 - 0.1µF
C2 - 1. Stand alone Speedo or Tach with return to Zero, 2000µF
2. With CS8441 application, 10µF
C3 - 0.1µF
C4 - 0.47µF
CT - 0.0033µF, ±30 PPM/¡C
D1 - 1A, 600 PIV
D2 - 50V, 500mW Zener
Speedo
Input
R2
R3
R4
CT
C3
Battery
D1 R1
D2 C1
1 CCPP++
2 SQOUT
3 FREQIN
4 Gnd
5 Gnd
6 COS+
7 COS-
8 VCC
CP- 16
F/VOUT 15
VREG 14
Gnd 13
Gnd 12
SINE+ 11
SINE- 10
BIAS 9
C4+
RT
COSINE
SINE
Gnd
Air Core
Speedometer
Gauge
200W
C2
1
CS8441
Figure 7
Air Core
Stepper Motor
200W
Odometer
Note 1: C2 (> 2000µF) is needed if return to zero function is required.
Note 2: The product of C4 and R4 have a direct effect on gain and
therefore directly effect temperature compensation.
Note 3: C4 Range; 20pF to .2µF.
Note 4: R4 Range; 100k½ to 500k½.
Note 5: The IC must be protected from transients above 60V and reverse
battery conditions.
Note 6: Additional filtering on the FREQIN lead may be required.
In some cases a designer may wish to use the CS8190 only
as a driver for an air-core meter having performed the F/V
conversion elsewhere in the circuit.
Figure 8 shows how to drive the CS8190 with a DC voltage
ranging from 2V to 6V. This is accomplished by forcing a
voltage on the F/VOUT lead. The alternative scheme shown
in Figure 9 uses an external op amp as a buffer and oper-
ates over an input voltage range of 0V to 4V.
100kW
VREG
CS8190
CP-
10kW
N/C
BIAS
An alternative solution is to use the CS4101 which has a
separate function generator input lead and can be driven
directly from a DC source.
VIN
100kW
0V to 4V DC
100kW
CS8190
100kW
BIAS +
CP- -
+
10kW
-
F/VOUT
100kW
VIN
2V to 6V DC
F/VOUT
Figure 9. Driving the CS8190 from an external DC voltage using an Op
Amp Buffer.
Figure 8. Driving the CS8190 from an external DC voltage.
7
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